A solid cylinder has a total surface area of 231 cm2. It curved surface area is of the total surface area. Find the volume of the cylinder.
Given,
Total surface area of cylinder = 231 cm2
Curved surface area =
so,
=
= 3 h = 2h + 2r
= h= 2r.............(i)
And,
=
=
=
=
= h = 2r = 2×3.5 = 7 cm
Volume of cylinder =